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# I-A-B Quiz Time: Physics Practice [Pic]

See if you can solve this equation.

Credits: SMBC

### Submitted by: cobrakiller

[Total: 16    Average: 3/5]
Hits: 9480
Rating: 3
Category: Science
Date: 11/28/12 07:06 AM

### 21 Responses to I-A-B Quiz Time: Physics Practice [Pic]

1. cobrakiller Male 18-29
7426 posts
November 28, 2012 at 6:42 am
Link: I-A-B Quiz Time: Physics Practice - See if you can solve this equation.
2. Canoas Male 18-29
427 posts
November 28, 2012 at 7:14 am
7.8125*10^(-4) m/s
7379 posts
November 28, 2012 at 7:57 am
If I were in space, I`d be travelling the speed of light by now...
4. Nickel2 Male 50-59
5879 posts
November 28, 2012 at 8:23 am
Only 5ml?
5. jendrian Male 18-29
2516 posts
November 28, 2012 at 9:26 am
@Canoas: that`s only true if the 1e^{-3} is a 10^{-3} and not an exp(-3)
6. bataleon27 Male 18-29
1178 posts
November 28, 2012 at 9:26 am
7. Ilikelogic Male 40-49
550 posts
November 28, 2012 at 9:42 am
.78 mm/s
I would propose a bullet of 5 gram hitting a grownup at a speed of 45 km/h, would make him move at a speed of .74 mm/s by transfer of the momentum.

Cobrakiller,
congrats for being able to apply your knowledge to your day to day life, as the formula can be applied here on earth too.

8. greenbasterd Male 18-29
2377 posts
November 28, 2012 at 10:00 am
right, that`s not taking any gravity into account.. this info is bogus
9. mikelae18 Male 18-29
79 posts
November 28, 2012 at 10:18 am
I`m 64.4 kg and my ejaculate is 8.2 gm (yes i`ve actually measured it, dont`t ask). I`ve never measured my ejaculate speed so I`ll use 12.5 m/s. ... 1.6 mm/s.
10. mikelae18 Male 18-29
79 posts
November 28, 2012 at 10:20 am
"right, that`s not taking any gravity into account.. this info is bogus"

in space
11. FoolsPrussia Male 30-39
3446 posts
November 28, 2012 at 10:28 am
Impossible, because it`s too cold in space to get an erection.
12. Langer Male 18-29
394 posts
November 28, 2012 at 10:54 am
"Impossible, because it`s too cold in space to get an erection."

how about one of those planes, that astronauts train in, that alternate between ascent and descent to produce 0 gravity inside...

...oh dear, this could take bukkake to a whole new level
13. Mr_Ike Male 18-29
164 posts
November 28, 2012 at 11:27 am
@Greenbasterd. Gravity has nothing to do with this. Its about calculating a delta-v in response to accelerating a mass.

(Which comes out to 0,775 mm/s according to my calculation)
14. Angilion Male 40-49
12390 posts
November 28, 2012 at 4:56 pm
Impossible, because it`s too cold in space to get an erection.

Rapidly dying would be a much bigger problem if you were naked in space.

But, surprisingly, it wouldn`t necessarily be all that cold. Most of space is close to a perfect vacuum. As a result, heat loss by conduction or convection is negligable. Heat loss by radiation would continue as normal, but that`s not all that large for a human.

So you`d be dead quickly, but your corpse wouldn`t freeze for a very long time. I think you wouldn`t even feel cold, but I`m not sure.
15. Angilion Male 40-49
12390 posts
November 28, 2012 at 5:07 pm
how about one of those planes, that astronauts train in, that alternate between ascent and descent to produce 0 gravity inside...

There is already porn of that. Seriously, there is. You can rent those planes, if you have enough money. Someone did so for part of a porno sci-fi film.
16. patchgrabber Male 30-39
5812 posts
November 28, 2012 at 8:19 pm
I think you wouldn`t even feel cold, but I`m not sure.
As long as you were in space in the shade you wouldn`t really feel anything. If you were in direct view of the sun you`d approach 123 degrees celsius, but I think the radiation might do you in before you got to that temperature. @Angillion is definitely right that you would eventually drop to about 3 degrees kelvin (there`s always residual background radiation everywhere in space leftover from the big bang).
17. patchgrabber Male 30-39
5812 posts
November 28, 2012 at 8:20 pm
But you`d definitely die from suffocation before you froze.
18. Angilion Male 40-49
12390 posts
November 28, 2012 at 9:22 pm
But you`d definitely die from suffocation before you froze.

Hence my comment about rapidly dying being more of a problem (than whether or not you could get an erection).

The lack of pressure would kill you even before the lack of oxygen would, though technically it could still be classed as suffocation. Although I think you might die from internal injuries if your lungs were full of air (which would expand a lot).

But definitely dying rapidly, one way or another. You could jump to the airlock of a very nearby rescue ship, but you`d better make it on the first attempt.

Hmm...would your corpse rot? It would be warm for many years, but I think it would rapidly become sterile too because I think that bacteria that can live in humans wouldn`t survive in a corpse in space.

What a weird topic of conversation.
19. Angilion Male 40-49
12390 posts
November 28, 2012 at 9:37 pm
Well, I looked it up...

You`d start to lose consciousness from oxygen deprivation in about 15 seconds - the process is highly accelerated by the lack of pressure making your lungs work in reverse, taking oxygen out of your blood.

That`s assuming that you did as I suggested and breathed out. If you don`t, you`re probably dead from internal injuries in that 15s. Your lungs can`t expand *that* much.

Surface water will boil very quickly (water will boil at skin temperature in vacuum). Close your eyes and mouth - plenty of water on the surfaces.

You`ll get the bends. Bad times.

But the startling thing is that if you breathe out you won`t die for maybe as long as 90s. You`ll be unconscious in 15s, but if you breathe out and get medical attention in 90s you`ll recover. Probably. Although you`ll be blind for a while.
20. ferdyfred Male 40-49
13606 posts
November 29, 2012 at 1:34 am
Learn something new every day!!
21. McGovern1981 Male 30-39
14273 posts
November 29, 2012 at 7:05 am